最新FCKEditor ASP上传绕过漏洞

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exploiut-db：
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FCKEditor ASP Version 2.6.8 File Upload Protection Bypass

- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
- Credit goes to: Mostafa Azizi, Soroush Dalili
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
6 @" A1 ~' k1 |# b- Description:
There is no validation on the extensions when FCKEditor 2.6.8 ASP version is
dealing with the duplicate files. As a result, it is possible to bypass
! S' L' x1 F2 q/ e1 ythe protection and upload a file with any extension.
- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
3 v* A5 r+ h% V" C! _8 J7 s- Solution: Please check the provided reference or the vendor website.
- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
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Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
$ Q4 ]) m3 H# s4 Q& ~2 kIn “config.asp”, wherever you have:
      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
0 I/ ~; B1 y* t5 i+ e. `Change it to:
; _% G( b5 ?9 v  }. S      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”
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+ T; ~: o( Q4 p- k3 jphp测试无效
asp/aspx测试成功：
来到/FCKeditor/editor/filemanager/connectors/test.html
因为结合了之前二次上传的漏洞，所以先上传任意内容的文件：asd.asp.txt
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burpsuite上传包并修改，repeater
& C4 M" O1 L2 `; L名字改为asd.asp%00txt    然后把%00专为URL编码上传后得到asd(1).asp

如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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